In regards to .25 Tungsten you could try Southern Tool and Steel. 1-800-647-5188. They have a minimum order but I cant remember how much. I think its either $50.00 or $100.00. Its expensive stuff ,I think they wanted $12.95 each for .25"X1.5" long pieces. You could also try looking in the Thomas Register to shop around for a better price. Hope this helps. Regards to all